Volatile Organic Compounds from Pesticide Application and Contribution to Tropospheric Ozone

Marty, Melanie A.; Spurlock, Frank; Barry, Terrell

doi:10.1016/b978-0-12-374367-1.00019-7

Cited by 8 publications

(5 citation statements)

References 75 publications

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“…However, due to its low boiling temperature (40 • C), DCM, as a volatile liquid compound, belongs to a group of organochlorinated pollutants which contributes to the destruction of the ozonosphere, the photochemical pollution and the greenhouse effect. On the other hand, organochlorinated compounds are very toxic and carcinogenic [1][2][3][4][5]. Therefore, finding effective technologies to remove chloromethanes from residual streams is necessary.…”

Section: Introductionmentioning

confidence: 99%

Recycling of Gas Phase Residual Dichloromethane by Hydrodechlorination: Regeneration of Deactivated Pd/C Catalysts

et al. 2019

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Dichloromethane (DCM) is an important pollutant with very harmful effects on human health and the environment. Catalytic hydrodechlorination (HDC) is an environmentally friendly technology for its removal from gas streams; it avoids the formation of hazardous pollutants like dioxins and phosgene (produced by other techniques), and the products obtained can be reused in other industries. When compared to other precious metals, Pd/C catalyst exhibited a better catalytic activity. However, the catalyst showed a significant deactivation during the reaction. In this study, the oxidation state and particle size of Pd was monitored with time on stream in order to elucidate the transformations that the catalyst undergoes during HDC. The deactivation can be ascribed to the formation of a new PdC x phase during the first hour of reaction. Carbon atoms incorporated to Pd lattice come from (chloro)-hydrocarbons adsorbed in the metallic species, whose transformation is promoted by the HCl originating in the reaction. Nevertheless, the catalyst was regenerated by air flow treatment at 250 • C, recovering the catalyst more than 80% of initial DCM conversion.

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Section: Introductionmentioning

confidence: 99%

Recycling of Gas Phase Residual Dichloromethane by Hydrodechlorination: Regeneration of Deactivated Pd/C Catalysts

et al. 2019

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“…A volatile organic compound is defined by EPA as any compound of carbon, excluding carbon monoxide, carbon dioxide, carbonic acid, metallic carbides or carbonates and ammonium carbonate, that participates in atmospheric photochemical reactions. In fact, VOCs are organic chemicals that, when released into the atmosphere, can react with sunlight and nitrogen oxides (NO x ) to form tropospheric ozone [29]. VOCs can be either primary or secondary pollutants.…”

Section: Volatile Organic Compoundsmentioning

confidence: 99%

A Scoping Review on Wearable Devices for Environmental Monitoring and Their Application for Health and Wellness

Bernasconi¹,

Angelucci²,

Aliverti³

2022

Sensors

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This scoping review is focused on wearable devices for environmental monitoring. First, the main pollutants are presented, followed by sensing technologies that are used for the parameters of interest. Selected examples of wearables and portables are divided into commercially available and research-level projects. While many commercial products are in fact portable, there is an increasing interest in using a completely wearable technology. This allows us to correlate the pollution level to other personal information (performed activity, position, and respiratory parameters) and thus to estimate personal exposure to given pollutants. The fact that there are no univocal indices to estimate outdoor or indoor air quality is also an open problem. Finally, applications of wearables for environmental monitoring are discussed. Combining environmental monitoring with other devices would permit better choices of where to perform sports activities, especially in highly polluted areas, and provide detailed information on the living conditions of individuals.

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“…VOCs originating from biogenic sources play crucial roles in atmospheric chemistry because they are strong ozone precursors that supply essential OH radicals in ambient air for the formation of tropospheric ozone [82,83]. VOCs has been identified for formation of photochemical smog, stratospheric ozone depletion and the formation of organic acids which contribute to environmental acidification by lowering the pH of rainwater [84][85][86].…”

Section: Volatile Organic Compoundsmentioning

confidence: 99%

Health Impacts of Air Pollution

Wahab¹

2021

Environmental Sustainability - Preparing for Tomorrow

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Urban air pollution has become a salient environmental issue in many Asian countries due to their rapid industrial development, urbanization, and motorization. Human-induced air pollution has been and continues to be considered a major environmental and public health issue. Its severity lies in the fact that high levels of pollutants are produced in environments where damage to human to concentration, duration of exposure health and welfare is more likely. This potential is what makes anthropogenic air pollution an important concern. Extreme air pollution episodes were reported for the Meuse Valley, Belgium, in 1930; Donora, PA, and the Monongehela River Valley in 1948; and London in 1952. These episodes are significant in that they provided solid scientific documentation that exposure to elevated ambient pollutant levels can cause acute illness and even death. The most devastating events contributed to important efforts to control ambient air pollution. The International Agency for Research on Cancer (IARC) assessment concluded that outdoor air pollution is carcinogenic to humans, with the particulate matter component of air pollution mostly associated with increasing cancer incidence especially lung cancer. Pollutant effects typically occur in some target organs. These can be straightforward; i.e. pollutants come into close contact with the affected organ.. Such is the case for eye and respiratory irritation. Effects may be indirect. For example, Pollutants can enter the bloodstream from the lungs or gastrointestinal system through the respiratory route. Effects may then be distant from the immediate organ of contact. A target organ can have no immediate and intimate contact with atmospheric contaminants.. The primary organs or target organs are the eyes and the respiratory and cardiovascular systems.

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Volatile Organic Compounds from Pesticide Application and Contribution to Tropospheric Ozone

Cited by 8 publications

References 75 publications

Recycling of Gas Phase Residual Dichloromethane by Hydrodechlorination: Regeneration of Deactivated Pd/C Catalysts

Recycling of Gas Phase Residual Dichloromethane by Hydrodechlorination: Regeneration of Deactivated Pd/C Catalysts

A Scoping Review on Wearable Devices for Environmental Monitoring and Their Application for Health and Wellness

Health Impacts of Air Pollution

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